4E2B
      +---------
FF46B | 893BA9EF
       -BBA7A
        =====
        4A11D9
       -6C9858
        ======
         A0B14E
        -AF43F4
         ======
          7132AF
         -7F7FDA
          ======
           400A6

base: 16
letters: 0123456789ABCDEF
difficulty: hard